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Forland BM, Hughey KD, Wilhelm MJ, Williams ON, Cappello BF, Gaspar CL, Myers TL, Sharpe SW, Johnson TJ. Optimal Spectral Resolution for Infrared Studies of Solids and Liquids. APPLIED SPECTROSCOPY 2024; 78:486-503. [PMID: 38404070 DOI: 10.1177/00037028241231601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Due to a legacy originating in the limited capability of early computers, the spectroscopic resolution used in Fourier transform infrared spectroscopy and other systems has largely been implemented using only powers of two for more than 50 years. In this study, we investigate debunking the spectroscopic lore of, e.g., using only 2, 4, 8, or 16 cm-1 resolution and determine the optimal resolution in terms of both (i) a desired signal-to-noise ratio and (ii) efficient use of acquisition time. The study is facilitated by the availability of solids and liquids reference spectral data recorded at 2.0 cm-1 resolution and is based on an examination in the 4000-400 cm-1 range of 61 liquids and 70 solids spectra, with a total analysis of 4237 peaks, each of which was also examined for being singlet/multiplet in nature. Of the 1765 liquid bands examined, only 27 had widths <5 cm-1. Of the 2472 solid bands examined, only 39 peaks have widths <5 cm-1. For both the liquid and solid bands, a skewed distribution of peak widths was observed: For liquids, the mean peak width was 24.7 cm-1 but the median peak width was 13.7 cm-1, and, similarly, for solids, the mean peak width was 22.2 cm-1 but the median peak width was 11.2 cm-1. While recognizing other studies may differ in scope and limiting the analysis to only room temperature data, we have found that a resolution to resolve 95% of all bands is 5.7 cm-1 for liquids and 5.3 cm-1 for solids; such a resolution would capture the native linewidth (not accounting for instrumental broadening) for 95% of all the solids and liquid bands, respectively. After decades of measuring liquids and solids at 4, 8, or 16 cm-1 resolution, we suggest that, when accounting only for intrinsic linewidths, an optimized resolution of 6.0 cm-1 will capture 91% of all condensed-phase bands, i.e., broadening of only 9% of the narrowest of bands, but yielding a large gain in signal-to-noise with minimal loss of specificity.
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Affiliation(s)
- Brenda M Forland
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Kendall D Hughey
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | | | | | | | - Connor L Gaspar
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Tanya L Myers
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Steven W Sharpe
- Pacific Northwest National Laboratory, Richland, Washington, USA
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2
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Benndorf S, Schleusener A, Müller R, Micheel M, Baruah R, Dellith J, Undisz A, Neumann C, Turchanin A, Leopold K, Weigand W, Wächtler M. Covalent Functionalization of CdSe Quantum Dot Films with Molecular [FeFe] Hydrogenase Mimics for Light-Driven Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2023; 15:18889-18897. [PMID: 37014708 PMCID: PMC10120591 DOI: 10.1021/acsami.3c00184] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/28/2023] [Indexed: 05/27/2023]
Abstract
CdSe quantum dots (QDs) combined with [FeFe] hydrogenase mimics as molecular catalytic reaction centers based on earth-abundant elements have demonstrated promising activity for photocatalytic hydrogen generation. Direct linking of the [FeFe] hydrogenase mimics to the QD surface is expected to establish a close contact between the [FeFe] hydrogenase mimics and the light-harvesting QDs, supporting the transfer and accumulation of several electrons needed to drive hydrogen evolution. In this work, we report on the functionalization of QDs immobilized in a thin-film architecture on a substrate with [FeFe] hydrogenase mimics by covalent linking via carboxylate groups as the anchoring functionality. The functionalization was monitored via UV/vis, photoluminescence, IR, and X-ray photoelectron spectroscopy and quantified via micro-X-ray fluorescence spectrometry. The activity of the functionalized thin film was demonstrated, and turn-over numbers in the range of 360-580 (short linkers) and 130-160 (long linkers) were achieved. This work presents a proof-of-concept study, showing the potential of thin-film architectures of immobilized QDs as a platform for light-driven hydrogen evolution without the need for intricate surface modifications to ensure colloidal stability in aqueous environments.
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Affiliation(s)
- Stefan Benndorf
- Institute
of Inorganic and Analytical Chemistry, Friedrich
Schiller University Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Alexander Schleusener
- Institute
of Physical Chemistry, Friedrich Schiller
University Jena, Helmholtzweg
4, 07743 Jena, Germany
- Department:
Functional Interface, Leibniz Institute
of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Riccarda Müller
- Institute
of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee
11, 89081 Ulm, Germany
| | - Mathias Micheel
- Department:
Functional Interface, Leibniz Institute
of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Raktim Baruah
- Institute
of Physical Chemistry, Friedrich Schiller
University Jena, Helmholtzweg
4, 07743 Jena, Germany
- Department:
Functional Interface, Leibniz Institute
of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Jan Dellith
- Department:
Functional Interface, Leibniz Institute
of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Andreas Undisz
- Institute
of Materials Science and Engineering, Chemnitz
University of Technology, Erfenschlager Str. 73, 09125 Chemnitz, Germany
- Otto Schott
Institute of Materials Research, Friedrich
Schiller University Jena, 07743 Jena, Germany
| | - Christof Neumann
- Institute
of Physical Chemistry, Friedrich Schiller
University Jena, Helmholtzweg
4, 07743 Jena, Germany
| | - Andrey Turchanin
- Institute
of Physical Chemistry, Friedrich Schiller
University Jena, Helmholtzweg
4, 07743 Jena, Germany
- Abbe
Center of Photonics (ACP), Friedrich Schiller
University Jena, Albert-Einstein-Straße
6, 07745 Jena, Germany
| | - Kerstin Leopold
- Institute
of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee
11, 89081 Ulm, Germany
| | - Wolfgang Weigand
- Institute
of Inorganic and Analytical Chemistry, Friedrich
Schiller University Jena, Humboldtstr. 8, 07743 Jena, Germany
| | - Maria Wächtler
- Institute
of Physical Chemistry, Friedrich Schiller
University Jena, Helmholtzweg
4, 07743 Jena, Germany
- Department:
Functional Interface, Leibniz Institute
of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
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3
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Zamader A, Reuillard B, Pécaut J, Billon L, Bousquet A, Berggren G, Artero V. Non-Covalent Integration of a [FeFe]-Hydrogenase Mimic to Multiwalled Carbon Nanotubes for Electrocatalytic Hydrogen Evolution. Chemistry 2022; 28:e202202260. [PMID: 36069308 PMCID: PMC10092503 DOI: 10.1002/chem.202202260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Indexed: 12/14/2022]
Abstract
Surface integration of molecular catalysts inspired from the active sites of hydrogenase enzymes represents a promising route towards developing noble metal-free and sustainable technologies for H2 production. Efficient and stable catalyst anchoring is a key aspect to enable this approach. Herein, we report the preparation and electrochemical characterization of an original diironhexacarbonyl complex including two pyrene groups per catalytic unit in order to allow for its smooth integration, through π-interactions, onto multiwalled carbon nanotube-based electrodes. In this configuration, the grafted catalyst could reach turnover numbers for H2 production (TONH2 ) of up to 4±2×103 within 20 h of bulk electrolysis, operating at neutral pH. Post operando analysis of catalyst functionalized electrodes revealed the degradation of the catalytic unit occurred via loss of the iron carbonyl units, while the anchoring groups and most part of the ligand remained attached onto multiwalled carbon nanotubes.
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Affiliation(s)
- Afridi Zamader
- Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux, 17 rue des Martyrs, F-38054, Grenoble, Cedex, France.,Molecular Biomimetics, Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, SE-75120, Uppsala, Sweden
| | - Bertrand Reuillard
- Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux, 17 rue des Martyrs, F-38054, Grenoble, Cedex, France
| | - Jacques Pécaut
- Univ. Grenoble Alpes, CEA, CNRS, IRIG-SyMMES, UMR 5819, 38000, Grenoble, France
| | - Laurent Billon
- Universite Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, 64000, Pau, France.,Bio-inspired Materials Group: Functionalities & Self-Assembly, Universite de Pau et Pays de l'Adour, E2S UPPA, 64053, Pau, France
| | - Antoine Bousquet
- Bio-inspired Materials Group: Functionalities & Self-Assembly, Universite de Pau et Pays de l'Adour, E2S UPPA, 64053, Pau, France
| | - Gustav Berggren
- Molecular Biomimetics, Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, SE-75120, Uppsala, Sweden
| | - Vincent Artero
- Univ. Grenoble Alpes, CNRS, CEA, IRIG, Laboratoire de Chimie et Biologie des Métaux, 17 rue des Martyrs, F-38054, Grenoble, Cedex, France
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4
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Schleusener A, Micheel M, Benndorf S, Rettenmayr M, Weigand W, Wächtler M. Ultrafast Electron Transfer from CdSe Quantum Dots to an [FeFe]-Hydrogenase Mimic. J Phys Chem Lett 2021; 12:4385-4391. [PMID: 33939438 DOI: 10.1021/acs.jpclett.1c01028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The combination of CdSe nanoparticles as photosensitizers with [FeFe]-hydrogenase mimics is known to result in efficient systems for light-driven hydrogen generation with reported turnover numbers in the order of 104-106. Nevertheless, little is known about the details of the light-induced charge-transfer processes. Here, we investigate the time scale of light-induced electron transfer kinetics for a simple model system consisting of CdSe quantum dots (QDs) of 2.0 nm diameter and a simple [FeFe]-hydrogenase mimic adsorbed to the QD surface under noncatalytic conditions. Our (time-resolved) spectroscopic investigation shows that both hot electron transfer on a sub-ps time scale and band-edge electron transfer on a sub-10 ps time scale from photoexcited QDs to adsorbed [FeFe]-hydrogenase mimics occur. Fast recombination via back electron transfer is observed in the absence of a sacrificial agent or protons which, under real catalytic conditions, would quench remaining holes or could stabilize the charge separation, respectively.
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Affiliation(s)
- Alexander Schleusener
- Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Mathias Micheel
- Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
| | - Stefan Benndorf
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Markus Rettenmayr
- Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, 07743 Jena, Germany
| | - Wolfgang Weigand
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, 07743 Jena, Germany
| | - Maria Wächtler
- Department Functional Interfaces, Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
- Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str. 6, 07745 Jena, Germany
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5
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Meyers A, Heilweil EJ, Stromberg CJ. Photodynamics of Asymmetric Di-Iron-Cyano Hydrogenases Examined by Time-Resolved Mid-Infrared Spectroscopy. J Phys Chem A 2021; 125:1413-1423. [PMID: 33567824 DOI: 10.1021/acs.jpca.0c08921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two anionic asymmetric Fe-Fe hydrogenase model compounds containing a single cyano (CN) and five carboxyl (CO) ligands, [Et4N][Fe2(μ-S2C3H6)(CO)5(CN)1] and [Et4N][Fe2(μ-S2C2H4)(CO)5(CN)1], dissolved in room-temperature acetonitrile, are examined. The molecular asymmetry affects the redox potentials of the central iron atoms, thus changing the photophysics and possible catalytic properties of the compounds. Femtosecond ultraviolet excitation with mid-infrared probe spectroscopy of the model compounds was employed to better understand the ultrafast dynamics of the enzyme-active site. Continuous ultraviolet lamp excitation with Fourier transform infrared (FTIR) spectroscopy was also used to explore stable product formation on the second timescale. For both model compounds, two timescales are observed; a 20-30 ps decay and the formation of a long-lived photoproduct. The picosecond decay is assigned to vibrational cooling and rotational dynamics, while the residual spectra remain for up to 300 ps, suggesting the formation of new photoproducts. Static FTIR spectroscopy yielded a different stable photoproduct than that observed on the ultrafast timescale. Density functional theory calculations simulated photoproducts for CO-loss and CN-loss isomers, and the resulting photoproduct spectra suggest that the picosecond transients arise from a complex mixture of isomerization after CO-loss, while dimerization and formation of a CN-containing Fe-CO-Fe bridged species are also considered.
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Affiliation(s)
- Amber Meyers
- Department of Chemistry and Physics, Hood College, Frederick, Maryland 21701-8524, United States
| | - Edwin J Heilweil
- Nanoscale Device Characterization Division, Physical Measurement Laboratory, National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, United States
| | - Christopher J Stromberg
- Department of Chemistry and Physics, Hood College, Frederick, Maryland 21701-8524, United States
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6
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Marx M, Mele A, Spannenberg A, Steinlechner C, Junge H, Schollhammer P, Beller M. Addressing the Reproducibility of Photocatalytic Carbon Dioxide Reduction. ChemCatChem 2020. [DOI: 10.1002/cctc.201901686] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maximilian Marx
- Leibniz Institute for Catalysis at theUniversity of Rostock Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Andrea Mele
- UMR CNRS 6521 CEMCA Faculté des Sciences et TechniquesUniversity of Brest 6 Avenue Victor le Gorgeu Brest 29238 France
| | - Anke Spannenberg
- Leibniz Institute for Catalysis at theUniversity of Rostock Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Christoph Steinlechner
- Leibniz Institute for Catalysis at theUniversity of Rostock Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Henrik Junge
- Leibniz Institute for Catalysis at theUniversity of Rostock Albert-Einstein-Straße 29a Rostock 18059 Germany
| | - Philippe Schollhammer
- UMR CNRS 6521 CEMCA Faculté des Sciences et TechniquesUniversity of Brest 6 Avenue Victor le Gorgeu Brest 29238 France
| | - Matthias Beller
- Leibniz Institute for Catalysis at theUniversity of Rostock Albert-Einstein-Straße 29a Rostock 18059 Germany
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7
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Li S, Chen W, Hu X, Feng F. Self-Assembly of Albumin and [FeFe]-Hydrogenase Mimics for Photocatalytic Hydrogen Evolution. ACS APPLIED BIO MATERIALS 2020; 3:2482-2488. [DOI: 10.1021/acsabm.0c00194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuyi Li
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, Department of Polymer Science & Engineering, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Weijian Chen
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, Department of Polymer Science & Engineering, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiantao Hu
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, Department of Polymer Science & Engineering, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Fude Feng
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, Department of Polymer Science & Engineering, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing 210023, China
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8
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Thornley W, Wirick SA, Riedel-Topper M, DeYonker NJ, Bitterwolf TE, Stromberg CJ, Heilweil EJ. Photodynamics of [FeFe]-Hydrogenase Model Compounds with Bidentate Heterocyclic Ligands. J Phys Chem B 2019; 123:7137-7148. [PMID: 31334657 PMCID: PMC6857538 DOI: 10.1021/acs.jpcb.9b04675] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two asymmetrically structured model compounds for the hydrogen-generating [Fe-Fe]-hydrogenase active site were investigated to determine the ultrafast photodynamics, structural intermediates, and photoproducts compared to more common symmetric di-iron species. The bidentate-ligand-containing compounds studied were Fe2(μ-S2C3H6)(CO)4(bipy), 1, and Fe2(μ-S2C3H6)(CO)4(phen), 2, in dilute room temperature acetonitrile solution and low-temperature 2Me-THF matrix isolation using static FTIR difference and time-resolved infrared spectroscopic methods (TRIR). Ultraviolet-visible spectra were also compared to time-dependent density functional theory (TD-DFT) to ascertain the orbital origins of long wavelength electronic absorption features. The spectroscopic evidence supports the conclusions that only a propyl-bridge flip occurs in low-temperature matrix, while early time CO ejection leads to the formation of solvated isomeric species on the 25 ps time scale in room temperature solution.
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Affiliation(s)
- Wyatt Thornley
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., MS 2343, Moscow, ID 83844-2343, United States
| | - Sarah A. Wirick
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Maximilian Riedel-Topper
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Nathan J. DeYonker
- Department of Chemistry, The University of Memphis, 411 Smith Hall, 3744 Walker Avenue, Memphis, TN 38152
| | - Thomas E. Bitterwolf
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., MS 2343, Moscow, ID 83844-2343, United States
| | - Christopher J. Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD 21701-8524, United States
| | - Edwin J. Heilweil
- Nanoscale Device Characterization Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8443 United States
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9
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Manton JC, Cerpentier FJR, Harvey EC, Clark IP, Greetham GM, Long C, Pryce MT. Photochemical or electrochemical bond breaking – exploring the chemistry of (μ 2-alkyne)Co 2(CO) 6 complexes using time-resolved infrared spectroscopy, spectro-electrochemical and density functional methods. Dalton Trans 2019; 48:14642-14652. [DOI: 10.1039/c9dt03006a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoassisted Pauson–Khand reaction involves the formation of a high-spin diradical species and not CO loss as previously thought.
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Affiliation(s)
| | | | - Emma C. Harvey
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Ian P. Clark
- Central Laser Facility
- Science & Technology Facilities Council
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
| | - Gregory M. Greetham
- Central Laser Facility
- Science & Technology Facilities Council
- Research Complex at Harwell
- Rutherford Appleton Laboratory
- Didcot
| | - Conor Long
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Mary T. Pryce
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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10
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Ochmann M, Hussain A, von Ahnen I, Cordones AA, Hong K, Lee JH, Ma R, Adamczyk K, Kim TK, Schoenlein RW, Vendrell O, Huse N. UV-Photochemistry of the Disulfide Bond: Evolution of Early Photoproducts from Picosecond X-ray Absorption Spectroscopy at the Sulfur K-Edge. J Am Chem Soc 2018; 140:6554-6561. [PMID: 29771112 DOI: 10.1021/jacs.7b13455] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We have investigated dimethyl disulfide as the basic moiety for understanding the photochemistry of disulfide bonds, which are central to a broad range of biochemical processes. Picosecond time-resolved X-ray absorption spectroscopy at the sulfur K-edge provides unique element-specific insight into the photochemistry of the disulfide bond initiated by 267 nm femtosecond pulses. We observe a broad but distinct transient induced absorption spectrum which recovers on at least two time scales in the nanosecond range. We employed RASSCF electronic structure calculations to simulate the sulfur-1s transitions of multiple possible chemical species, and identified the methylthiyl and methylperthiyl radicals as the primary reaction products. In addition, we identify disulfur and the CH2S thione as the secondary reaction products of the perthiyl radical that are most likely to explain the observed spectral and kinetic signatures of our experiment. Our study underscores the importance of elemental specificity and the potential of time-resolved X-ray spectroscopy to identify short-lived reaction products in complex reaction schemes that underlie the rich photochemistry of disulfide systems.
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Affiliation(s)
- Miguel Ochmann
- Department of Physics , University of Hamburg and Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science , 22761 Hamburg , Germany
| | - Abid Hussain
- Department of Physics , University of Hamburg and Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science , 22761 Hamburg , Germany
| | - Inga von Ahnen
- Department of Physics , University of Hamburg and Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science , 22761 Hamburg , Germany
| | - Amy A Cordones
- Ultrafast X-ray Science Lab, Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Kiryong Hong
- Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , South Korea
| | - Jae Hyuk Lee
- Ultrafast X-ray Science Lab, Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Rory Ma
- Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , South Korea
| | - Katrin Adamczyk
- Department of Physics , University of Hamburg and Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science , 22761 Hamburg , Germany
| | - Tae Kyu Kim
- Department of Chemistry and Chemistry Institute of Functional Materials , Pusan National University , Busan 46241 , South Korea
| | - Robert W Schoenlein
- Ultrafast X-ray Science Lab, Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Oriol Vendrell
- Center for Free-Electron Laser Science , DESY and The Hamburg Centre for Ultrafast Imaging , 22607 Hamburg , Germany
| | - Nils Huse
- Department of Physics , University of Hamburg and Max Planck Institute for the Structure and Dynamics of Matter, Center for Free Electron Laser Science , 22761 Hamburg , Germany
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11
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Stromberg CJ, Heilweil EJ. Ultrafast Photodynamics of Cyano-Functionalized [FeFe] Hydrogenase Model Compounds. J Phys Chem A 2018; 122:4023-4030. [PMID: 29652502 PMCID: PMC6051340 DOI: 10.1021/acs.jpca.8b00661] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[FeFe] hydrogenases are efficient enzymes that produce hydrogen gas under mild conditions. Synthetic model compounds containing all CO or mixed CO/PMe3 ligands were previously studied by us and others with ultrafast ultraviolet or visible pump-infrared probe spectroscopy in an effort to better understand the function and interactions of the active site with light. Studies of anionic species containing cyano groups, which more closely match the biological active site, have been elusive. In this work, two model compounds dissolved in room-temperature acetonitrile solution were examined: [Fe2(μ-S2C3H6)(CO)4(CN)2]2- (1) and [Fe2(μ-S2C2H4)(CO)4(CN)2]2- (2). These species exhibit long-lived transient signals consistent with loss of one CO ligand with potential isomerization of newly formed ground electronic state photoproducts, as previously observed with all-CO and CO/PMe3-containing models. We find no evidence for fast (ca. 150 ps) relaxation seen in the all-CO and CO/PMe3 compounds because of the absence of the metal-to-metal charge transfer band in the cyano-functionalized models. These results indicate that incorporation of cyano ligands may significantly alter the electronic properties and photoproducts produced immediately after photoexcitation, which may influence the catalytic activity of model compounds when attached to photosensitizers.
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Affiliation(s)
- Christopher J. Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Avenue, Frederick, Maryland 21701-8524, United States
| | - Edwin J. Heilweil
- Engineering Physics Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899-8443 United States
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12
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Meyer RL, Zhandosova AD, Biser TM, Heilweil EJ, Stromberg CJ. Photochemical Dynamics of a Trimethyl-Phosphine Derivatized [FeFe]-Hydrogenase Model Compound. Chem Phys 2018; 512. [PMID: 30983684 DOI: 10.1016/j.chemphys.2017.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Though there have been many studies on photosensitizers coupled to model complexes of the [FeFe]-hydrogenases, few have looked at how the models react upon exposure to light. To extract photoreaction information, ultrafast time-resolved UV/visible pump, IR probe spectroscopy was performed on Fe2(μ-S2C2H4)(CO)4(PMe3)2 (2b) dissolved in heptane and acetonitrile and the photochemical dynamics were determined. Excitation with 532 and 355 nm light produces bleaches and new absorptions that decay to half their original intensity with time constants of 300 ± 120 ps and 380 ± 210 ps in heptane and acetonitrile, respectively. These features persist to the microsecond timescale. The dynamics of 2b are assigned to formation of an initial set of photoproducts, which were a mixture of excited-state tricarbonyl isomers. These isomers decay into another set of long-lived photoproducts in which approximately half the excited-state tricarbonyl isomers recombine with CO to form another complex mixture of tricarbonyl and tetracarbonyl isomers.
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Affiliation(s)
- Rachel L Meyer
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA.,Department of Chemistry, University of Rochester, RC Box 270216, Rochester, NY 14627
| | - Annette D Zhandosova
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA.,Touro College of Osteopathic Medicine, 230 West 125 St., New York, NY 10027
| | - Tara M Biser
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA.,Bloomberg School of Public Health, Johns Hopkins University, 615 N. Wolfe St., Baltimore, MD 21205
| | - Edwin J Heilweil
- Radiation Physics Division, Physical Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899-8443, USA
| | - Christopher J Stromberg
- Department of Chemistry and Physics, Hood College, 401 Rosemont Ave., Frederick, MD, 21701-8524, USA
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13
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Sensi M, Baffert C, Fradale L, Gauquelin C, Soucaille P, Meynial-Salles I, Bottin H, de Gioia L, Bruschi M, Fourmond V, Léger C, Bertini L. Photoinhibition of FeFe Hydrogenase. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02252] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Matteo Sensi
- Aix Marseille University, CNRS, BIP UMR 7281, 13402 CEDEX 20 Marseille, France
- Department
of Biotechnologies and Biosciences, University of Milano-Bicocca, Piazza
della Scienza 2, 20126 Milan, Italy
| | - Carole Baffert
- Aix Marseille University, CNRS, BIP UMR 7281, 13402 CEDEX 20 Marseille, France
| | - Laura Fradale
- Aix Marseille University, CNRS, BIP UMR 7281, 13402 CEDEX 20 Marseille, France
| | - Charles Gauquelin
- Université de Toulouse, INSA, UPS, INP, LISBP, INRA:UMR792,135
CNRS:UMR 5504, Avenue
de Rangueil, 31077 Toulouse, France
| | - Philippe Soucaille
- Université de Toulouse, INSA, UPS, INP, LISBP, INRA:UMR792,135
CNRS:UMR 5504, Avenue
de Rangueil, 31077 Toulouse, France
| | - Isabelle Meynial-Salles
- Université de Toulouse, INSA, UPS, INP, LISBP, INRA:UMR792,135
CNRS:UMR 5504, Avenue
de Rangueil, 31077 Toulouse, France
| | - Hervé Bottin
- Institut
de Biologie Intégrative de la Cellule (I2BC), Institut Frédéric
Joliot, CEA, CNRS, Univ Paris-Sud, Université Paris-Saclay, F-91198 CEDEX Gif-Sur-Yvette, France
| | - Luca de Gioia
- Department
of Biotechnologies and Biosciences, University of Milano-Bicocca, Piazza
della Scienza 2, 20126 Milan, Italy
| | - Maurizio Bruschi
- Department
of Earth and Environmental Sciences, Milano-Bicocca University, Piazza della
Scienza 1, 20126 Milan, Italy
- Department
of Biotechnologies and Biosciences, University of Milano-Bicocca, Piazza
della Scienza 2, 20126 Milan, Italy
| | - Vincent Fourmond
- Aix Marseille University, CNRS, BIP UMR 7281, 13402 CEDEX 20 Marseille, France
| | - Christophe Léger
- Aix Marseille University, CNRS, BIP UMR 7281, 13402 CEDEX 20 Marseille, France
| | - Luca Bertini
- Department
of Biotechnologies and Biosciences, University of Milano-Bicocca, Piazza
della Scienza 2, 20126 Milan, Italy
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14
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Eckert PA, Kubarych KJ. Dynamic Flexibility of Hydrogenase Active Site Models Studied with 2D-IR Spectroscopy. J Phys Chem A 2017; 121:608-615. [PMID: 28032999 DOI: 10.1021/acs.jpca.6b11962] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Hydrogenase enzymes enable organisms to use H2 as an energy source, having evolved extremely efficient biological catalysts for the reversible oxidation of molecular hydrogen. Small-molecule mimics of these enzymes provide both simplified models of the catalysis reactions and potential artificial catalysts that might be used to facilitate a hydrogen economy. We have studied two diiron hydrogenase mimics, μ-pdt-[Fe(CO)3]2 and μ-edt-[Fe(CO)3]2 (pdt = propanedithiolate, edt = ethanedithiolate), in a series of alkane solvents and have observed significant ultrafast spectral dynamics using two-dimensional infrared (2D-IR) spectroscopy. Since solvent fluctuations in nonpolar alkanes do not lead to substantial electrostatic modulations in a solute's vibrational mode frequencies, we attribute the spectral diffusion dynamics to intramolecular flexibility. The intramolecular origin is supported by the absence of any measurable solvent viscosity dependence, indicating that the frequency fluctuations are not coupled to the solvent motional dynamics. Quantum chemical calculations reveal a pronounced coupling between the low-frequency torsional rotation of the carbonyl ligands and the terminal CO stretching vibrations. The flexibility of the CO ligands has been proposed to play a central role in the catalytic reaction mechanism, and our results highlight that the CO ligands are highly flexible on a picosecond time scale.
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Affiliation(s)
- Peter A Eckert
- Department of Chemistry, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Kevin J Kubarych
- Department of Chemistry, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States
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15
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Hunt A, Barrett J, McCurry M, Works C. Photochemical reactivity of a binuclear Fe(I)–Fe(I) hydrogenase model compound with cyano ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Wang F, Wen M, Feng K, Liang WJ, Li XB, Chen B, Tung CH, Wu LZ. Amphiphilic polymeric micelles as microreactors: improving the photocatalytic hydrogen production of the [FeFe]-hydrogenase mimic in water. Chem Commun (Camb) 2016; 52:457-60. [DOI: 10.1039/c5cc07499a] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An amphiphilic polymeric micelle is utilized as a microreactor to load a hydrophobic [FeFe]-hydrogenase mimic for photocatalytic hydrogen production in water.
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Affiliation(s)
- Feng Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Min Wen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Ke Feng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Wen-Jing Liang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Xu-Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences
- The Chinese Academy of Sciences
- Beijing 100190
- P. R. China
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17
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Hunt NT, Wright JA, Pickett C. Detection of Transient Intermediates Generated from Subsite Analogues of [FeFe] Hydrogenases. Inorg Chem 2015; 55:399-410. [DOI: 10.1021/acs.inorgchem.5b02477] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Neil T. Hunt
- Department of Physics, University of Strathclyde, SUPA, Glasgow G4 0NG, United Kingdom
| | - Joseph A. Wright
- Energy Materials Laboratory, School of
Chemistry, University of East Anglia (UEA), Norwich Research Park, Norwich NR4 7TJ, United Kingdom
| | - Christopher Pickett
- Energy Materials Laboratory, School of
Chemistry, University of East Anglia (UEA), Norwich Research Park, Norwich NR4 7TJ, United Kingdom
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18
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Summers PA, Calladine JA, Ghiotto F, Dawson J, Sun XZ, Hamilton ML, Towrie M, Davies ES, McMaster J, George MW, Schröder M. Synthesis and Photophysical Study of a [NiFe] Hydrogenase Biomimetic Compound Covalently Linked to a Re-diimine Photosensitizer. Inorg Chem 2015; 55:527-36. [PMID: 26605700 PMCID: PMC4774970 DOI: 10.1021/acs.inorgchem.5b01744] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The synthesis, photophysics, and
photochemistry of a linked dyad ([Re]-[NiFe2]) containing
an analogue ([NiFe2]) of the active site of [NiFe] hydrogenase,
covalently bound to a Re-diimine photosensitizer ([Re]), are described.
Following excitation, the mechanisms of electron transfer involving
the [Re] and [NiFe2] centers and the resulting decomposition
were investigated. Excitation of the [Re] center results in the population
of a diimine-based metal-to-ligand charge transfer excited state.
Reductive quenching by NEt3 produces the radically reduced
form of [Re], [Re]− (kq = 1.4 ± 0.1 × 107 M–1 s–1). Once formed, [Re]− reduces the
[NiFe2] center to [NiFe2]−, and this reduction was followed using time-resolved infrared spectroscopy.
The concentration dependence of the electron transfer rate constants
suggests that both inter- and intramolecular electron transfer pathways
are involved, and the rate constants for these processes have been
estimated (kinter = 5.9 ± 0.7 ×
108 M–1 s–1, kintra = 1.5 ± 0.1 × 105 s–1). For the analogous bimolecular system, only
intermolecular electron transfer could be observed (kinter = 3.8 ± 0.5 × 109 M–1 s–1). Fourier transform infrared spectroscopic
studies confirms that decomposition of the dyad occurs upon prolonged
photolysis, and this appears to be a major factor for the low activity
of the system toward H2 production in acidic conditions. Excitation of the [Re] center in the linked-dyad complex
([Re]-[NiFe2]) populates the 3MLCT excited state,
and reductive quenching by NEt3 produces [Re]−. [Re]− reduces the [NiFe2] center to
[NiFe2]− via inter- and intramolecular
electron transfer pathways (kinter = 5.9
± 0.7 × 108 M−1 s−1, kintra = 1.5 ± 0.1 × 105 s−1). For the analogous bimolecular system,
where only intermolecular electron transfer could be observed, kinter = 3.8 ± 0.5 × 109 M−1 s−1.
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Affiliation(s)
- Peter A Summers
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom.,Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China , Ningbo 315100, China
| | - James A Calladine
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Fabio Ghiotto
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Joe Dawson
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Xue-Z Sun
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Michelle L Hamilton
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom.,Dynamic Structural Science Consortium, Research Complex at Harwell , Didcot, Oxfordshire OX11 0FA, United Kingdom
| | - Michael Towrie
- Central Laser Facility, Research Complex at Harwell, Science and Technology Facilities Council, Rutherford Appleton Laboratory , Harwell Oxford, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - E Stephen Davies
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Jonathan McMaster
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom
| | - Michael W George
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom.,Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China , Ningbo 315100, China
| | - Martin Schröder
- School of Chemistry, The University of Nottingham , University Park, Nottingham NG7 2RD, United Kingdom.,School of Chemistry, University of Manchester , Manchester M13 9PL, United Kingdom
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19
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Thornley WA, Bitterwolf TE. Intramolecular CH Activation and Metallacycle Aromaticity in the Photochemistry of [FeFe]-Hydrogenase Model Compounds in Low-Temperature Frozen Matrices. Chemistry 2015; 21:18218-29. [PMID: 26541102 DOI: 10.1002/chem.201503826] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Wyatt A Thornley
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., Moscow, ID 83844 (USA).
| | - Thomas E Bitterwolf
- Department of Chemistry, University of Idaho, 875 Perimeter Dr., Moscow, ID 83844 (USA).
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20
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Wang Z, Li SS, Wang LW. Efficient real-time time-dependent density functional theory method and its application to a collision of an ion with a 2D material. PHYSICAL REVIEW LETTERS 2015; 114:063004. [PMID: 25723218 DOI: 10.1103/physrevlett.114.063004] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Indexed: 06/04/2023]
Abstract
We have developed an efficient real-time time-dependent density functional theory (TDDFT) method that can increase the effective time step from <1 as in traditional methods to 0.1-0.5 fs. With this algorithm, the TDDFT simulation can have comparable speed to the Born-Oppenheimer (BO) ab initio molecular dynamics (MD). As an application, we simulated the process of an energetic Cl particle colliding onto a monolayer of MoSe(2). Our simulations show a significant energy transfer from the kinetic energy of the Cl particle to the electronic energy of MoSe(2), and the result of TDDFT is very different from that of BO-MD simulations.
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Affiliation(s)
- Zhi Wang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Shu-Shen Li
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China
| | - Lin-Wang Wang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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21
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Liang W, Wang F, Wen M, Jian J, Wang X, Chen B, Tung C, Wu L. Branched Polyethylenimine Improves Hydrogen Photoproduction from a CdSe Quantum Dot/[FeFe]‐Hydrogenase Mimic System in Neutral Aqueous Solutions. Chemistry 2015; 21:3187-92. [DOI: 10.1002/chem.201406361] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Wen‐Jing Liang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Feng Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Min Wen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Jing‐Xin Jian
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Xu‐Zhe Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Chen‐Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Beijing 100190 (P.R. China), Fax: (+86) 10‐8254‐3580
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22
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Primary photochemical dynamics of metal carbonyl dimers and clusters in solution: Insights into the results of metal–metal bond cleavage from ultrafast spectroscopic studies. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.07.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Caplins BW, Lomont JP, Nguyen SC, Harris CB. Vibrational Cooling Dynamics of a [FeFe]-Hydrogenase Mimic Probed by Time-Resolved Infrared Spectroscopy. J Phys Chem A 2014; 118:11529-40. [DOI: 10.1021/jp510517z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Benjamin W. Caplins
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Justin P. Lomont
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Son C. Nguyen
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Charles B. Harris
- Department
of Chemistry, University of California at Berkeley, Berkeley, California 94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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24
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Frederix PWJM, Adamczyk K, Wright JA, Tuttle T, Ulijn RV, Pickett CJ, Hunt NT. Investigation of the Ultrafast Dynamics Occurring during Unsensitized Photocatalytic H2 Evolution by an [FeFe]-Hydrogenase Subsite Analogue. Organometallics 2014. [DOI: 10.1021/om500521w] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Pim W. J. M. Frederix
- Department
of Physics, University of Strathclyde, SUPA, Glasgow G4 0NG, United Kingdom
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom
| | - Katrin Adamczyk
- Department
of Physics, University of Strathclyde, SUPA, Glasgow G4 0NG, United Kingdom
| | - Joseph A. Wright
- Energy
Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
| | - Tell Tuttle
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom
| | - Rein V. Ulijn
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom
| | - Christopher J. Pickett
- Energy
Materials Laboratory, School of Chemistry, University of East Anglia, Norwich Research
Park, Norwich NR4 7TJ, United Kingdom
| | - Neil T. Hunt
- Department
of Physics, University of Strathclyde, SUPA, Glasgow G4 0NG, United Kingdom
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25
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Li P, Amirjalayer S, Hartl F, Lutz M, Bruin BD, Becker R, Woutersen S, Reek JNH. Direct Probing of Photoinduced Electron Transfer in a Self-Assembled Biomimetic [2Fe2S]-Hydrogenase Complex Using Ultrafast Vibrational Spectroscopy. Inorg Chem 2014; 53:5373-83. [DOI: 10.1021/ic500777d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Ping Li
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Saeed Amirjalayer
- Molecular
Photonics, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - František Hartl
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Martin Lutz
- Crystal
and Structural Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Bas de Bruin
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - René Becker
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Sander Woutersen
- Molecular
Photonics, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Joost N. H. Reek
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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26
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Panman MR, Vos J, Bocokić V, Bellini R, de Bruin B, Reek JHN, Woutersen S. Exchanging conformations of a hydroformylation catalyst structurally characterized using two-dimensional vibrational spectroscopy. Inorg Chem 2013; 52:14294-8. [PMID: 24256078 DOI: 10.1021/ic402254q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Catalytic transition-metal complexes often occur in several conformations that exchange rapidly (<ms) in solution so that their spatial structures are difficult to characterize with conventional methods. Here, we determine specific bond angles in the two rapidly exchanging solution conformations of the hydroformylation catalyst (xantphos)Rh(CO)2H using two-dimensional vibrational spectroscopy, a method that can be applied to any catalyst provided that the exchange between its conformers occurs on a time scale of a few picoseconds or slower. We find that, in one of the conformations, the OC-Rh-CO angle deviates significantly from the canonical value in a trigonal-bipyramidal structure. On the basis of complementary density functional calculations, we ascribe this effect to attractive van der Waals interaction between the CO and the xantphos ligand.
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Affiliation(s)
- Matthijs R Panman
- Van 't Hoff Institute for Molecular Sciences, University of Amsterdam , Science Park 904, 1098 XH Amsterdam, The Netherlands
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27
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Johnson M, Thuman J, Letterman RG, Stromberg CJ, Webster CE, Heilweil EJ. Time-Resolved Infrared Studies of a Trimethylphosphine Model Derivative of [FeFe]-Hydrogenase. J Phys Chem B 2013; 117:15792-803. [PMID: 24083980 DOI: 10.1021/jp4067873] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Melissa Johnson
- Department
of Chemistry and Physics, Hood College, 401 Rosemont Avenue, Frederick, Maryland 21701-8524 United States
| | - James Thuman
- Department
of Chemistry and Physics, Hood College, 401 Rosemont Avenue, Frederick, Maryland 21701-8524 United States
| | - Roger G. Letterman
- Department
of Chemistry, The University of Memphis, 213 Smith Chemistry Building, Memphis, Tennessee 38152-3550, United States
| | - Christopher J. Stromberg
- Department
of Chemistry and Physics, Hood College, 401 Rosemont Avenue, Frederick, Maryland 21701-8524 United States
| | - Charles Edwin Webster
- Department
of Chemistry, The University of Memphis, 213 Smith Chemistry Building, Memphis, Tennessee 38152-3550, United States
| | - Edwin J. Heilweil
- Radiation
Physics Division, Physical Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899-8443, United States
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28
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Bradler M, Werhahn JC, Hutzler D, Fuhrmann S, Heider R, Riedle E, Iglev H, Kienberger R. A novel setup for femtosecond pump-repump-probe IR spectroscopy with few cycle CEP stable pulses. OPTICS EXPRESS 2013; 21:20145-20158. [PMID: 24105560 DOI: 10.1364/oe.21.020145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present a three-color mid-IR setup for vibrational pump-repump-probe experiments with a temporal resolution well below 100 fs and a freely selectable spectral resolution of 20 to 360 cm(-1) for the pump and repump. The usable probe range without optical realignment is 900 cm(-1). The experimental design employed is greatly simplified compared to the widely used setups, highly robust and includes a novel means for generation of tunable few-cycle pulses with stable carrier-envelope phase. A Ti:sapphire pump system operating with 1 kHz and a modest 150 fs pulse duration supplies the total pump energy of just 0.6 mJ. The good signal-to-noise ratio of the setup allows the determination of spectrally resolved transient probe changes smaller than 6·10(-5) OD at 130 time delays in just 45 minutes. The performance of the spectrometer is demonstrated with transient IR spectra and decay curves of HDO molecules in lithium nitrate trihydrate and ice and a first all MIR pump-repump-probe measurement.
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Dorfman KE, Fingerhut BP, Mukamel S. Broadband infrared and Raman probes of excited-state vibrational molecular dynamics: simulation protocols based on loop diagrams. Phys Chem Chem Phys 2013; 15:12348-59. [PMID: 23783120 PMCID: PMC3744248 DOI: 10.1039/c3cp51117k] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vibrational motions in electronically excited states can be observed either by time and frequency resolved infrared absorption or by off resonant stimulated Raman techniques. Multipoint correlation function expressions are derived for both signals. Three representations which suggest different simulation protocols for the signals are developed. These are based on the forward and the backward propagation of the wavefunction, sum over state expansion using an effective vibrational Hamiltonian or a semiclassical treatment of a bath. We show that the effective temporal (Δt) and spectral (Δω) resolution of the techniques is not controlled solely by experimental knobs but also depends on the system dynamics being probed. The Fourier uncertainty ΔωΔt > 1 is never violated.
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Affiliation(s)
- Konstantin E Dorfman
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA.
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